Two different models of CO2 transfer units are used by the Navy. This chapter covers the transfer unit Model SC-5 and the Model 4211. The two units are similar to operate but the maintenance requirements listed in the operator's manuals are different.

MODEL SC-5

Figure 3-1 shows the complete transfer unit setup required to perform CO2 transfers. All Model SC-5 units are basically the same except for variations in the motor and the